This volume is not altogether psychologic, there is considerable overstepping to at least what might perhaps be called the ultra-physiologic side of psychology, if it is psychology at all. There are also in its contents what seem superfluous portions not really essential to the truly scientific treatment of the subject matter. It is, of course, readily understood that the subject is one that is difficult to handle in a manner altogether beyond criticism. The title page gives a fairly adequate idea of the general nature of the contents of the work.